1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2013 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21
22 #include "php.h"
23
24 #include <zend_strtod.h>
25
26 #include <stddef.h>
27 #include <stdio.h>
28 #include <ctype.h>
29 #include <sys/types.h>
30 #include <stdarg.h>
31 #include <string.h>
32 #include <stdlib.h>
33 #include <math.h>
34
35 #ifdef HAVE_INTTYPES_H
36 #include <inttypes.h>
37 #endif
38
39 #ifdef HAVE_LOCALE_H
40 #include <locale.h>
41 #define LCONV_DECIMAL_POINT (*lconv->decimal_point)
42 #else
43 #define LCONV_DECIMAL_POINT '.'
44 #endif
45
46 /*
47 * Copyright (c) 2002, 2006 Todd C. Miller <Todd.Miller@courtesan.com>
48 *
49 * Permission to use, copy, modify, and distribute this software for any
50 * purpose with or without fee is hereby granted, provided that the above
51 * copyright notice and this permission notice appear in all copies.
52 *
53 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
54 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
55 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
56 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
57 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
58 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
59 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
60 *
61 * Sponsored in part by the Defense Advanced Research Projects
62 * Agency (DARPA) and Air Force Research Laboratory, Air Force
63 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
64 */
65
__cvt(double value,int ndigit,int * decpt,int * sign,int fmode,int pad)66 static char * __cvt(double value, int ndigit, int *decpt, int *sign, int fmode, int pad) /* {{{ */
67 {
68 register char *s = NULL;
69 char *p, *rve, c;
70 size_t siz;
71
72 if (ndigit < 0) {
73 siz = -ndigit + 1;
74 } else {
75 siz = ndigit + 1;
76 }
77
78 /* __dtoa() doesn't allocate space for 0 so we do it by hand */
79 if (value == 0.0) {
80 *decpt = 1 - fmode; /* 1 for 'e', 0 for 'f' */
81 *sign = 0;
82 if ((rve = s = (char *)malloc(ndigit?siz:2)) == NULL) {
83 return(NULL);
84 }
85 *rve++ = '0';
86 *rve = '\0';
87 if (!ndigit) {
88 return(s);
89 }
90 } else {
91 p = zend_dtoa(value, fmode + 2, ndigit, decpt, sign, &rve);
92 if (*decpt == 9999) {
93 /* Infinity or Nan, convert to inf or nan like printf */
94 *decpt = 0;
95 c = *p;
96 zend_freedtoa(p);
97 return strdup((c == 'I' ? "INF" : "NAN"));
98 }
99 /* Make a local copy and adjust rve to be in terms of s */
100 if (pad && fmode) {
101 siz += *decpt;
102 }
103 if ((s = (char *)malloc(siz+1)) == NULL) {
104 zend_freedtoa(p);
105 return(NULL);
106 }
107 (void) strlcpy(s, p, siz);
108 rve = s + (rve - p);
109 zend_freedtoa(p);
110 }
111
112 /* Add trailing zeros */
113 if (pad) {
114 siz -= rve - s;
115 while (--siz) {
116 *rve++ = '0';
117 }
118 *rve = '\0';
119 }
120
121 return(s);
122 }
123 /* }}} */
124
php_ecvt(double value,int ndigit,int * decpt,int * sign)125 static inline char *php_ecvt(double value, int ndigit, int *decpt, int *sign) /* {{{ */
126 {
127 return(__cvt(value, ndigit, decpt, sign, 0, 1));
128 }
129 /* }}} */
130
php_fcvt(double value,int ndigit,int * decpt,int * sign)131 static inline char *php_fcvt(double value, int ndigit, int *decpt, int *sign) /* {{{ */
132 {
133 return(__cvt(value, ndigit, decpt, sign, 1, 1));
134 }
135 /* }}} */
136
php_gcvt(double value,int ndigit,char dec_point,char exponent,char * buf)137 PHPAPI char *php_gcvt(double value, int ndigit, char dec_point, char exponent, char *buf) /* {{{ */
138 {
139 char *digits, *dst, *src;
140 int i, decpt, sign;
141
142 digits = zend_dtoa(value, 2, ndigit, &decpt, &sign, NULL);
143 if (decpt == 9999) {
144 /*
145 * Infinity or NaN, convert to inf or nan with sign.
146 * We assume the buffer is at least ndigit long.
147 */
148 snprintf(buf, ndigit + 1, "%s%s", (sign && *digits == 'I') ? "-" : "", *digits == 'I' ? "INF" : "NAN");
149 zend_freedtoa(digits);
150 return (buf);
151 }
152
153 dst = buf;
154 if (sign) {
155 *dst++ = '-';
156 }
157
158 if ((decpt >= 0 && decpt > ndigit) || decpt < -3) { /* use E-style */
159 /* exponential format (e.g. 1.2345e+13) */
160 if (--decpt < 0) {
161 sign = 1;
162 decpt = -decpt;
163 } else {
164 sign = 0;
165 }
166 src = digits;
167 *dst++ = *src++;
168 *dst++ = dec_point;
169 if (*src == '\0') {
170 *dst++ = '0';
171 } else {
172 do {
173 *dst++ = *src++;
174 } while (*src != '\0');
175 }
176 *dst++ = exponent;
177 if (sign) {
178 *dst++ = '-';
179 } else {
180 *dst++ = '+';
181 }
182 if (decpt < 10) {
183 *dst++ = '0' + decpt;
184 *dst = '\0';
185 } else {
186 /* XXX - optimize */
187 for (sign = decpt, i = 0; (sign /= 10) != 0; i++)
188 continue;
189 dst[i + 1] = '\0';
190 while (decpt != 0) {
191 dst[i--] = '0' + decpt % 10;
192 decpt /= 10;
193 }
194 }
195 } else if (decpt < 0) {
196 /* standard format 0. */
197 *dst++ = '0'; /* zero before decimal point */
198 *dst++ = dec_point;
199 do {
200 *dst++ = '0';
201 } while (++decpt < 0);
202 src = digits;
203 while (*src != '\0') {
204 *dst++ = *src++;
205 }
206 *dst = '\0';
207 } else {
208 /* standard format */
209 for (i = 0, src = digits; i < decpt; i++) {
210 if (*src != '\0') {
211 *dst++ = *src++;
212 } else {
213 *dst++ = '0';
214 }
215 }
216 if (*src != '\0') {
217 if (src == digits) {
218 *dst++ = '0'; /* zero before decimal point */
219 }
220 *dst++ = dec_point;
221 for (i = decpt; digits[i] != '\0'; i++) {
222 *dst++ = digits[i];
223 }
224 }
225 *dst = '\0';
226 }
227 zend_freedtoa(digits);
228 return (buf);
229 }
230 /* }}} */
231
232 /* {{{ Apache license */
233 /* ====================================================================
234 * Copyright (c) 1995-1998 The Apache Group. All rights reserved.
235 *
236 * Redistribution and use in source and binary forms, with or without
237 * modification, are permitted provided that the following conditions
238 * are met:
239 *
240 * 1. Redistributions of source code must retain the above copyright
241 * notice, this list of conditions and the following disclaimer.
242 *
243 * 2. Redistributions in binary form must reproduce the above copyright
244 * notice, this list of conditions and the following disclaimer in
245 * the documentation and/or other materials provided with the
246 * distribution.
247 *
248 * 3. All advertising materials mentioning features or use of this
249 * software must display the following acknowledgment:
250 * "This product includes software developed by the Apache Group
251 * for use in the Apache HTTP server project (http://www.apache.org/)."
252 *
253 * 4. The names "Apache Server" and "Apache Group" must not be used to
254 * endorse or promote products derived from this software without
255 * prior written permission.
256 *
257 * 5. Redistributions of any form whatsoever must retain the following
258 * acknowledgment:
259 * "This product includes software developed by the Apache Group
260 * for use in the Apache HTTP server project (http://www.apache.org/)."
261 *
262 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
263 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
264 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
265 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
266 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
267 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
268 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
269 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
270 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
271 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
272 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
273 * OF THE POSSIBILITY OF SUCH DAMAGE.
274 * ====================================================================
275 *
276 * This software consists of voluntary contributions made by many
277 * individuals on behalf of the Apache Group and was originally based
278 * on public domain software written at the National Center for
279 * Supercomputing Applications, University of Illinois, Urbana-Champaign.
280 * For more information on the Apache Group and the Apache HTTP server
281 * project, please see <http://www.apache.org/>.
282 *
283 * This code is based on, and used with the permission of, the
284 * SIO stdio-replacement strx_* functions by Panos Tsirigotis
285 * <panos@alumni.cs.colorado.edu> for xinetd.
286 */
287 /* }}} */
288
289 #define FALSE 0
290 #define TRUE 1
291 #define NUL '\0'
292 #define INT_NULL ((int *)0)
293
294 #define S_NULL "(null)"
295 #define S_NULL_LEN 6
296
297 #define FLOAT_DIGITS 6
298 #define EXPONENT_LENGTH 10
299
300
301 /*
302 * Convert num to its decimal format.
303 * Return value:
304 * - a pointer to a string containing the number (no sign)
305 * - len contains the length of the string
306 * - is_negative is set to TRUE or FALSE depending on the sign
307 * of the number (always set to FALSE if is_unsigned is TRUE)
308 *
309 * The caller provides a buffer for the string: that is the buf_end argument
310 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
311 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
312 */
313 /* char * ap_php_conv_10() {{{ */
ap_php_conv_10(register wide_int num,register bool_int is_unsigned,register bool_int * is_negative,char * buf_end,register int * len)314 char * ap_php_conv_10(register wide_int num, register bool_int is_unsigned,
315 register bool_int * is_negative, char *buf_end, register int *len)
316 {
317 register char *p = buf_end;
318 register u_wide_int magnitude;
319
320 if (is_unsigned) {
321 magnitude = (u_wide_int) num;
322 *is_negative = FALSE;
323 } else {
324 *is_negative = (num < 0);
325
326 /*
327 * On a 2's complement machine, negating the most negative integer
328 * results in a number that cannot be represented as a signed integer.
329 * Here is what we do to obtain the number's magnitude:
330 * a. add 1 to the number
331 * b. negate it (becomes positive)
332 * c. convert it to unsigned
333 * d. add 1
334 */
335 if (*is_negative) {
336 wide_int t = num + 1;
337 magnitude = ((u_wide_int) - t) + 1;
338 } else {
339 magnitude = (u_wide_int) num;
340 }
341 }
342
343 /*
344 * We use a do-while loop so that we write at least 1 digit
345 */
346 do {
347 register u_wide_int new_magnitude = magnitude / 10;
348
349 *--p = (char)(magnitude - new_magnitude * 10 + '0');
350 magnitude = new_magnitude;
351 }
352 while (magnitude);
353
354 *len = buf_end - p;
355 return (p);
356 }
357 /* }}} */
358
359 /* If you change this value then also change bug24640.phpt.
360 * Also NDIG must be reasonable smaller than NUM_BUF_SIZE.
361 */
362 #define NDIG 320
363
364
365 /*
366 * Convert a floating point number to a string formats 'f', 'e' or 'E'.
367 * The result is placed in buf, and len denotes the length of the string
368 * The sign is returned in the is_negative argument (and is not placed
369 * in buf).
370 */
371 /* PHPAPI char * php_conv_fp() {{{ */
php_conv_fp(register char format,register double num,boolean_e add_dp,int precision,char dec_point,bool_int * is_negative,char * buf,int * len)372 PHPAPI char * php_conv_fp(register char format, register double num,
373 boolean_e add_dp, int precision, char dec_point, bool_int * is_negative, char *buf, int *len)
374 {
375 register char *s = buf;
376 register char *p, *p_orig;
377 int decimal_point;
378
379 if (precision >= NDIG - 1) {
380 precision = NDIG - 2;
381 }
382
383 if (format == 'F') {
384 p_orig = p = php_fcvt(num, precision, &decimal_point, is_negative);
385 } else { /* either e or E format */
386 p_orig = p = php_ecvt(num, precision + 1, &decimal_point, is_negative);
387 }
388
389 /*
390 * Check for Infinity and NaN
391 */
392 if (isalpha((int)*p)) {
393 *len = strlen(p);
394 memcpy(buf, p, *len + 1);
395 *is_negative = FALSE;
396 free(p_orig);
397 return (buf);
398 }
399 if (format == 'F') {
400 if (decimal_point <= 0) {
401 if (num != 0 || precision > 0) {
402 *s++ = '0';
403 if (precision > 0) {
404 *s++ = dec_point;
405 while (decimal_point++ < 0) {
406 *s++ = '0';
407 }
408 } else if (add_dp) {
409 *s++ = dec_point;
410 }
411 }
412 } else {
413 int addz = decimal_point >= NDIG ? decimal_point - NDIG + 1 : 0;
414 decimal_point -= addz;
415 while (decimal_point-- > 0) {
416 *s++ = *p++;
417 }
418 while (addz-- > 0) {
419 *s++ = '0';
420 }
421 if (precision > 0 || add_dp) {
422 *s++ = dec_point;
423 }
424 }
425 } else {
426 *s++ = *p++;
427 if (precision > 0 || add_dp) {
428 *s++ = '.';
429 }
430 }
431
432 /*
433 * copy the rest of p, the NUL is NOT copied
434 */
435 while (*p) {
436 *s++ = *p++;
437 }
438
439 if (format != 'F') {
440 char temp[EXPONENT_LENGTH]; /* for exponent conversion */
441 int t_len;
442 bool_int exponent_is_negative;
443
444 *s++ = format; /* either e or E */
445 decimal_point--;
446 if (decimal_point != 0) {
447 p = ap_php_conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative, &temp[EXPONENT_LENGTH], &t_len);
448 *s++ = exponent_is_negative ? '-' : '+';
449
450 /*
451 * Make sure the exponent has at least 2 digits
452 */
453 while (t_len--) {
454 *s++ = *p++;
455 }
456 } else {
457 *s++ = '+';
458 *s++ = '0';
459 }
460 }
461 *len = s - buf;
462 free(p_orig);
463 return (buf);
464 }
465 /* }}} */
466
467 /*
468 * Convert num to a base X number where X is a power of 2. nbits determines X.
469 * For example, if nbits is 3, we do base 8 conversion
470 * Return value:
471 * a pointer to a string containing the number
472 *
473 * The caller provides a buffer for the string: that is the buf_end argument
474 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
475 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
476 */
ap_php_conv_p2(register u_wide_int num,register int nbits,char format,char * buf_end,register int * len)477 char * ap_php_conv_p2(register u_wide_int num, register int nbits, char format, char *buf_end, register int *len) /* {{{ */
478 {
479 register int mask = (1 << nbits) - 1;
480 register char *p = buf_end;
481 static char low_digits[] = "0123456789abcdef";
482 static char upper_digits[] = "0123456789ABCDEF";
483 register char *digits = (format == 'X') ? upper_digits : low_digits;
484
485 do {
486 *--p = digits[num & mask];
487 num >>= nbits;
488 }
489 while (num);
490
491 *len = buf_end - p;
492 return (p);
493 }
494 /* }}} */
495
496 /*
497 * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions
498 *
499 * XXX: this is a magic number; do not decrease it
500 * Emax = 1023
501 * NDIG = 320
502 * NUM_BUF_SIZE >= strlen("-") + Emax + strlrn(".") + NDIG + strlen("E+1023") + 1;
503 */
504 #define NUM_BUF_SIZE 2048
505
506
507 /*
508 * Descriptor for buffer area
509 */
510 struct buf_area {
511 char *buf_end;
512 char *nextb; /* pointer to next byte to read/write */
513 };
514
515 typedef struct buf_area buffy;
516
517 /*
518 * The INS_CHAR macro inserts a character in the buffer and writes
519 * the buffer back to disk if necessary
520 * It uses the char pointers sp and bep:
521 * sp points to the next available character in the buffer
522 * bep points to the end-of-buffer+1
523 * While using this macro, note that the nextb pointer is NOT updated.
524 *
525 * NOTE: Evaluation of the c argument should not have any side-effects
526 */
527 #define INS_CHAR(c, sp, bep, cc) \
528 { \
529 if (sp < bep) \
530 { \
531 *sp++ = c; \
532 } \
533 cc++; \
534 }
535
536 #define NUM( c ) ( c - '0' )
537
538 #define STR_TO_DEC( str, num ) \
539 num = NUM( *str++ ) ; \
540 while ( isdigit((int)*str ) ) \
541 { \
542 num *= 10 ; \
543 num += NUM( *str++ ) ; \
544 }
545
546 /*
547 * This macro does zero padding so that the precision
548 * requirement is satisfied. The padding is done by
549 * adding '0's to the left of the string that is going
550 * to be printed.
551 */
552 #define FIX_PRECISION( adjust, precision, s, s_len ) \
553 if ( adjust ) \
554 while ( s_len < precision ) \
555 { \
556 *--s = '0' ; \
557 s_len++ ; \
558 }
559
560 /*
561 * Macro that does padding. The padding is done by printing
562 * the character ch.
563 */
564 #define PAD( width, len, ch ) do \
565 { \
566 INS_CHAR( ch, sp, bep, cc ) ; \
567 width-- ; \
568 } \
569 while ( width > len )
570
571 /*
572 * Prefix the character ch to the string str
573 * Increase length
574 * Set the has_prefix flag
575 */
576 #define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES
577
578
579 /*
580 * Do format conversion placing the output in buffer
581 */
format_converter(register buffy * odp,const char * fmt,va_list ap)582 static int format_converter(register buffy * odp, const char *fmt, va_list ap) /* {{{ */
583 {
584 char *sp;
585 char *bep;
586 int cc = 0;
587 int i;
588
589 char *s = NULL;
590 int s_len, free_zcopy;
591 zval *zvp, zcopy;
592
593 int min_width = 0;
594 int precision = 0;
595 enum {
596 LEFT, RIGHT
597 } adjust;
598 char pad_char;
599 char prefix_char;
600
601 double fp_num;
602 wide_int i_num = (wide_int) 0;
603 u_wide_int ui_num;
604
605 char num_buf[NUM_BUF_SIZE];
606 char char_buf[2]; /* for printing %% and %<unknown> */
607
608 #ifdef HAVE_LOCALE_H
609 struct lconv *lconv = NULL;
610 #endif
611
612 /*
613 * Flag variables
614 */
615 length_modifier_e modifier;
616 boolean_e alternate_form;
617 boolean_e print_sign;
618 boolean_e print_blank;
619 boolean_e adjust_precision;
620 boolean_e adjust_width;
621 bool_int is_negative;
622
623 sp = odp->nextb;
624 bep = odp->buf_end;
625
626 while (*fmt) {
627 if (*fmt != '%') {
628 INS_CHAR(*fmt, sp, bep, cc);
629 } else {
630 /*
631 * Default variable settings
632 */
633 adjust = RIGHT;
634 alternate_form = print_sign = print_blank = NO;
635 pad_char = ' ';
636 prefix_char = NUL;
637 free_zcopy = 0;
638
639 fmt++;
640
641 /*
642 * Try to avoid checking for flags, width or precision
643 */
644 if (isascii((int)*fmt) && !islower((int)*fmt)) {
645 /*
646 * Recognize flags: -, #, BLANK, +
647 */
648 for (;; fmt++) {
649 if (*fmt == '-')
650 adjust = LEFT;
651 else if (*fmt == '+')
652 print_sign = YES;
653 else if (*fmt == '#')
654 alternate_form = YES;
655 else if (*fmt == ' ')
656 print_blank = YES;
657 else if (*fmt == '0')
658 pad_char = '0';
659 else
660 break;
661 }
662
663 /*
664 * Check if a width was specified
665 */
666 if (isdigit((int)*fmt)) {
667 STR_TO_DEC(fmt, min_width);
668 adjust_width = YES;
669 } else if (*fmt == '*') {
670 min_width = va_arg(ap, int);
671 fmt++;
672 adjust_width = YES;
673 if (min_width < 0) {
674 adjust = LEFT;
675 min_width = -min_width;
676 }
677 } else
678 adjust_width = NO;
679
680 /*
681 * Check if a precision was specified
682 */
683 if (*fmt == '.') {
684 adjust_precision = YES;
685 fmt++;
686 if (isdigit((int)*fmt)) {
687 STR_TO_DEC(fmt, precision);
688 } else if (*fmt == '*') {
689 precision = va_arg(ap, int);
690 fmt++;
691 if (precision < 0)
692 precision = 0;
693 } else
694 precision = 0;
695
696 if (precision > FORMAT_CONV_MAX_PRECISION) {
697 precision = FORMAT_CONV_MAX_PRECISION;
698 }
699 } else
700 adjust_precision = NO;
701 } else
702 adjust_precision = adjust_width = NO;
703
704 /*
705 * Modifier check
706 */
707 switch (*fmt) {
708 case 'L':
709 fmt++;
710 modifier = LM_LONG_DOUBLE;
711 break;
712 case 'I':
713 fmt++;
714 #if SIZEOF_LONG_LONG
715 if (*fmt == '6' && *(fmt+1) == '4') {
716 fmt += 2;
717 modifier = LM_LONG_LONG;
718 } else
719 #endif
720 if (*fmt == '3' && *(fmt+1) == '2') {
721 fmt += 2;
722 modifier = LM_LONG;
723 } else {
724 #ifdef _WIN64
725 modifier = LM_LONG_LONG;
726 #else
727 modifier = LM_LONG;
728 #endif
729 }
730 break;
731 case 'l':
732 fmt++;
733 #if SIZEOF_LONG_LONG
734 if (*fmt == 'l') {
735 fmt++;
736 modifier = LM_LONG_LONG;
737 } else
738 #endif
739 modifier = LM_LONG;
740 break;
741 case 'z':
742 fmt++;
743 modifier = LM_SIZE_T;
744 break;
745 case 'j':
746 fmt++;
747 #if SIZEOF_INTMAX_T
748 modifier = LM_INTMAX_T;
749 #else
750 modifier = LM_SIZE_T;
751 #endif
752 break;
753 case 't':
754 fmt++;
755 #if SIZEOF_PTRDIFF_T
756 modifier = LM_PTRDIFF_T;
757 #else
758 modifier = LM_SIZE_T;
759 #endif
760 break;
761 case 'h':
762 fmt++;
763 if (*fmt == 'h') {
764 fmt++;
765 }
766 /* these are promoted to int, so no break */
767 default:
768 modifier = LM_STD;
769 break;
770 }
771
772 /*
773 * Argument extraction and printing.
774 * First we determine the argument type.
775 * Then, we convert the argument to a string.
776 * On exit from the switch, s points to the string that
777 * must be printed, s_len has the length of the string
778 * The precision requirements, if any, are reflected in s_len.
779 *
780 * NOTE: pad_char may be set to '0' because of the 0 flag.
781 * It is reset to ' ' by non-numeric formats
782 */
783 switch (*fmt) {
784 case 'Z':
785 zvp = (zval*) va_arg(ap, zval*);
786 zend_make_printable_zval(zvp, &zcopy, &free_zcopy);
787 if (free_zcopy) {
788 zvp = &zcopy;
789 }
790 s_len = Z_STRLEN_P(zvp);
791 s = Z_STRVAL_P(zvp);
792 if (adjust_precision && precision < s_len) {
793 s_len = precision;
794 }
795 break;
796 case 'u':
797 switch(modifier) {
798 default:
799 i_num = (wide_int) va_arg(ap, unsigned int);
800 break;
801 case LM_LONG_DOUBLE:
802 goto fmt_error;
803 case LM_LONG:
804 i_num = (wide_int) va_arg(ap, unsigned long int);
805 break;
806 case LM_SIZE_T:
807 i_num = (wide_int) va_arg(ap, size_t);
808 break;
809 #if SIZEOF_LONG_LONG
810 case LM_LONG_LONG:
811 i_num = (wide_int) va_arg(ap, u_wide_int);
812 break;
813 #endif
814 #if SIZEOF_INTMAX_T
815 case LM_INTMAX_T:
816 i_num = (wide_int) va_arg(ap, uintmax_t);
817 break;
818 #endif
819 #if SIZEOF_PTRDIFF_T
820 case LM_PTRDIFF_T:
821 i_num = (wide_int) va_arg(ap, ptrdiff_t);
822 break;
823 #endif
824 }
825 /*
826 * The rest also applies to other integer formats, so fall
827 * into that case.
828 */
829 case 'd':
830 case 'i':
831 /*
832 * Get the arg if we haven't already.
833 */
834 if ((*fmt) != 'u') {
835 switch(modifier) {
836 default:
837 i_num = (wide_int) va_arg(ap, int);
838 break;
839 case LM_LONG_DOUBLE:
840 goto fmt_error;
841 case LM_LONG:
842 i_num = (wide_int) va_arg(ap, long int);
843 break;
844 case LM_SIZE_T:
845 #if SIZEOF_SSIZE_T
846 i_num = (wide_int) va_arg(ap, ssize_t);
847 #else
848 i_num = (wide_int) va_arg(ap, size_t);
849 #endif
850 break;
851 #if SIZEOF_LONG_LONG
852 case LM_LONG_LONG:
853 i_num = (wide_int) va_arg(ap, wide_int);
854 break;
855 #endif
856 #if SIZEOF_INTMAX_T
857 case LM_INTMAX_T:
858 i_num = (wide_int) va_arg(ap, intmax_t);
859 break;
860 #endif
861 #if SIZEOF_PTRDIFF_T
862 case LM_PTRDIFF_T:
863 i_num = (wide_int) va_arg(ap, ptrdiff_t);
864 break;
865 #endif
866 }
867 }
868 s = ap_php_conv_10(i_num, (*fmt) == 'u', &is_negative,
869 &num_buf[NUM_BUF_SIZE], &s_len);
870 FIX_PRECISION(adjust_precision, precision, s, s_len);
871
872 if (*fmt != 'u') {
873 if (is_negative) {
874 prefix_char = '-';
875 } else if (print_sign) {
876 prefix_char = '+';
877 } else if (print_blank) {
878 prefix_char = ' ';
879 }
880 }
881 break;
882
883
884 case 'o':
885 switch(modifier) {
886 default:
887 ui_num = (u_wide_int) va_arg(ap, unsigned int);
888 break;
889 case LM_LONG_DOUBLE:
890 goto fmt_error;
891 case LM_LONG:
892 ui_num = (u_wide_int) va_arg(ap, unsigned long int);
893 break;
894 case LM_SIZE_T:
895 ui_num = (u_wide_int) va_arg(ap, size_t);
896 break;
897 #if SIZEOF_LONG_LONG
898 case LM_LONG_LONG:
899 ui_num = (u_wide_int) va_arg(ap, u_wide_int);
900 break;
901 #endif
902 #if SIZEOF_INTMAX_T
903 case LM_INTMAX_T:
904 ui_num = (u_wide_int) va_arg(ap, uintmax_t);
905 break;
906 #endif
907 #if SIZEOF_PTRDIFF_T
908 case LM_PTRDIFF_T:
909 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t);
910 break;
911 #endif
912 }
913 s = ap_php_conv_p2(ui_num, 3, *fmt, &num_buf[NUM_BUF_SIZE], &s_len);
914 FIX_PRECISION(adjust_precision, precision, s, s_len);
915 if (alternate_form && *s != '0') {
916 *--s = '0';
917 s_len++;
918 }
919 break;
920
921
922 case 'x':
923 case 'X':
924 switch(modifier) {
925 default:
926 ui_num = (u_wide_int) va_arg(ap, unsigned int);
927 break;
928 case LM_LONG_DOUBLE:
929 goto fmt_error;
930 case LM_LONG:
931 ui_num = (u_wide_int) va_arg(ap, unsigned long int);
932 break;
933 case LM_SIZE_T:
934 ui_num = (u_wide_int) va_arg(ap, size_t);
935 break;
936 #if SIZEOF_LONG_LONG
937 case LM_LONG_LONG:
938 ui_num = (u_wide_int) va_arg(ap, u_wide_int);
939 break;
940 #endif
941 #if SIZEOF_INTMAX_T
942 case LM_INTMAX_T:
943 ui_num = (u_wide_int) va_arg(ap, uintmax_t);
944 break;
945 #endif
946 #if SIZEOF_PTRDIFF_T
947 case LM_PTRDIFF_T:
948 ui_num = (u_wide_int) va_arg(ap, ptrdiff_t);
949 break;
950 #endif
951 }
952 s = ap_php_conv_p2(ui_num, 4, *fmt, &num_buf[NUM_BUF_SIZE], &s_len);
953 FIX_PRECISION(adjust_precision, precision, s, s_len);
954 if (alternate_form && i_num != 0) {
955 *--s = *fmt; /* 'x' or 'X' */
956 *--s = '0';
957 s_len += 2;
958 }
959 break;
960
961
962 case 's':
963 case 'v':
964 s = va_arg(ap, char *);
965 if (s != NULL) {
966 s_len = strlen(s);
967 if (adjust_precision && precision < s_len) {
968 s_len = precision;
969 }
970 } else {
971 s = S_NULL;
972 s_len = S_NULL_LEN;
973 }
974 pad_char = ' ';
975 break;
976
977
978 case 'f':
979 case 'F':
980 case 'e':
981 case 'E':
982 switch(modifier) {
983 case LM_LONG_DOUBLE:
984 fp_num = (double) va_arg(ap, long double);
985 break;
986 case LM_STD:
987 fp_num = va_arg(ap, double);
988 break;
989 default:
990 goto fmt_error;
991 }
992
993 if (zend_isnan(fp_num)) {
994 s = "NAN";
995 s_len = 3;
996 } else if (zend_isinf(fp_num)) {
997 s = "INF";
998 s_len = 3;
999 } else {
1000 #ifdef HAVE_LOCALE_H
1001 if (!lconv) {
1002 lconv = localeconv();
1003 }
1004 #endif
1005 s = php_conv_fp((*fmt == 'f')?'F':*fmt, fp_num, alternate_form,
1006 (adjust_precision == NO) ? FLOAT_DIGITS : precision,
1007 (*fmt == 'f')?LCONV_DECIMAL_POINT:'.',
1008 &is_negative, &num_buf[1], &s_len);
1009 if (is_negative)
1010 prefix_char = '-';
1011 else if (print_sign)
1012 prefix_char = '+';
1013 else if (print_blank)
1014 prefix_char = ' ';
1015 }
1016 break;
1017
1018
1019 case 'g':
1020 case 'k':
1021 case 'G':
1022 case 'H':
1023 switch(modifier) {
1024 case LM_LONG_DOUBLE:
1025 fp_num = (double) va_arg(ap, long double);
1026 break;
1027 case LM_STD:
1028 fp_num = va_arg(ap, double);
1029 break;
1030 default:
1031 goto fmt_error;
1032 }
1033
1034 if (zend_isnan(fp_num)) {
1035 s = "NAN";
1036 s_len = 3;
1037 break;
1038 } else if (zend_isinf(fp_num)) {
1039 if (fp_num > 0) {
1040 s = "INF";
1041 s_len = 3;
1042 } else {
1043 s = "-INF";
1044 s_len = 4;
1045 }
1046 break;
1047 }
1048
1049 if (adjust_precision == NO) {
1050 precision = FLOAT_DIGITS;
1051 } else if (precision == 0) {
1052 precision = 1;
1053 }
1054 /*
1055 * * We use &num_buf[ 1 ], so that we have room for the sign
1056 */
1057 #ifdef HAVE_LOCALE_H
1058 if (!lconv) {
1059 lconv = localeconv();
1060 }
1061 #endif
1062 s = php_gcvt(fp_num, precision, (*fmt=='H' || *fmt == 'k') ? '.' : LCONV_DECIMAL_POINT, (*fmt == 'G' || *fmt == 'H')?'E':'e', &num_buf[1]);
1063 if (*s == '-') {
1064 prefix_char = *s++;
1065 } else if (print_sign) {
1066 prefix_char = '+';
1067 } else if (print_blank) {
1068 prefix_char = ' ';
1069 }
1070
1071 s_len = strlen(s);
1072
1073 if (alternate_form && (strchr(s, '.')) == NULL) {
1074 s[s_len++] = '.';
1075 }
1076 break;
1077
1078
1079 case 'c':
1080 char_buf[0] = (char) (va_arg(ap, int));
1081 s = &char_buf[0];
1082 s_len = 1;
1083 pad_char = ' ';
1084 break;
1085
1086
1087 case '%':
1088 char_buf[0] = '%';
1089 s = &char_buf[0];
1090 s_len = 1;
1091 pad_char = ' ';
1092 break;
1093
1094
1095 case 'n':
1096 *(va_arg(ap, int *)) = cc;
1097 goto skip_output;
1098
1099 /*
1100 * Always extract the argument as a "char *" pointer. We
1101 * should be using "void *" but there are still machines
1102 * that don't understand it.
1103 * If the pointer size is equal to the size of an unsigned
1104 * integer we convert the pointer to a hex number, otherwise
1105 * we print "%p" to indicate that we don't handle "%p".
1106 */
1107 case 'p':
1108 if (sizeof(char *) <= sizeof(u_wide_int)) {
1109 ui_num = (u_wide_int)((size_t) va_arg(ap, char *));
1110 s = ap_php_conv_p2(ui_num, 4, 'x',
1111 &num_buf[NUM_BUF_SIZE], &s_len);
1112 if (ui_num != 0) {
1113 *--s = 'x';
1114 *--s = '0';
1115 s_len += 2;
1116 }
1117 } else {
1118 s = "%p";
1119 s_len = 2;
1120 }
1121 pad_char = ' ';
1122 break;
1123
1124
1125 case NUL:
1126 /*
1127 * The last character of the format string was %.
1128 * We ignore it.
1129 */
1130 continue;
1131
1132
1133 fmt_error:
1134 php_error(E_ERROR, "Illegal length modifier specified '%c' in s[np]printf call", *fmt);
1135 /*
1136 * The default case is for unrecognized %'s.
1137 * We print %<char> to help the user identify what
1138 * option is not understood.
1139 * This is also useful in case the user wants to pass
1140 * the output of format_converter to another function
1141 * that understands some other %<char> (like syslog).
1142 * Note that we can't point s inside fmt because the
1143 * unknown <char> could be preceded by width etc.
1144 */
1145 default:
1146 char_buf[0] = '%';
1147 char_buf[1] = *fmt;
1148 s = char_buf;
1149 s_len = 2;
1150 pad_char = ' ';
1151 break;
1152 }
1153
1154 if (prefix_char != NUL) {
1155 *--s = prefix_char;
1156 s_len++;
1157 }
1158 if (adjust_width && adjust == RIGHT && min_width > s_len) {
1159 if (pad_char == '0' && prefix_char != NUL) {
1160 INS_CHAR(*s, sp, bep, cc)
1161 s++;
1162 s_len--;
1163 min_width--;
1164 }
1165 PAD(min_width, s_len, pad_char);
1166 }
1167 /*
1168 * Print the string s.
1169 */
1170 for (i = s_len; i != 0; i--) {
1171 INS_CHAR(*s, sp, bep, cc);
1172 s++;
1173 }
1174
1175 if (adjust_width && adjust == LEFT && min_width > s_len)
1176 PAD(min_width, s_len, pad_char);
1177 if (free_zcopy) {
1178 zval_dtor(&zcopy);
1179 }
1180 }
1181 skip_output:
1182 fmt++;
1183 }
1184 odp->nextb = sp;
1185 return (cc);
1186 }
1187 /* }}} */
1188
1189 /*
1190 * This is the general purpose conversion function.
1191 */
strx_printv(int * ccp,char * buf,size_t len,const char * format,va_list ap)1192 static void strx_printv(int *ccp, char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1193 {
1194 buffy od;
1195 int cc;
1196
1197 /*
1198 * First initialize the descriptor
1199 * Notice that if no length is given, we initialize buf_end to the
1200 * highest possible address.
1201 */
1202 if (len == 0) {
1203 od.buf_end = (char *) ~0;
1204 od.nextb = (char *) ~0;
1205 } else {
1206 od.buf_end = &buf[len-1];
1207 od.nextb = buf;
1208 }
1209
1210 /*
1211 * Do the conversion
1212 */
1213 cc = format_converter(&od, format, ap);
1214 if (len != 0 && od.nextb <= od.buf_end) {
1215 *(od.nextb) = '\0';
1216 }
1217 if (ccp) {
1218 *ccp = cc;
1219 }
1220 }
1221 /* }}} */
1222
ap_php_slprintf(char * buf,size_t len,const char * format,...)1223 PHPAPI int ap_php_slprintf(char *buf, size_t len, const char *format,...) /* {{{ */
1224 {
1225 int cc;
1226 va_list ap;
1227
1228 va_start(ap, format);
1229 strx_printv(&cc, buf, len, format, ap);
1230 va_end(ap);
1231 if (cc >= len) {
1232 cc = len -1;
1233 buf[cc] = '\0';
1234 }
1235 return cc;
1236 }
1237 /* }}} */
1238
ap_php_vslprintf(char * buf,size_t len,const char * format,va_list ap)1239 PHPAPI int ap_php_vslprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1240 {
1241 int cc;
1242
1243 strx_printv(&cc, buf, len, format, ap);
1244 if (cc >= len) {
1245 cc = len -1;
1246 buf[cc] = '\0';
1247 }
1248 return cc;
1249 }
1250 /* }}} */
1251
ap_php_snprintf(char * buf,size_t len,const char * format,...)1252 PHPAPI int ap_php_snprintf(char *buf, size_t len, const char *format,...) /* {{{ */
1253 {
1254 int cc;
1255 va_list ap;
1256
1257 va_start(ap, format);
1258 strx_printv(&cc, buf, len, format, ap);
1259 va_end(ap);
1260 return (cc);
1261 }
1262 /* }}} */
1263
ap_php_vsnprintf(char * buf,size_t len,const char * format,va_list ap)1264 PHPAPI int ap_php_vsnprintf(char *buf, size_t len, const char *format, va_list ap) /* {{{ */
1265 {
1266 int cc;
1267
1268 strx_printv(&cc, buf, len, format, ap);
1269 return (cc);
1270 }
1271 /* }}} */
1272
ap_php_vasprintf(char ** buf,const char * format,va_list ap)1273 PHPAPI int ap_php_vasprintf(char **buf, const char *format, va_list ap) /* {{{ */
1274 {
1275 va_list ap2;
1276 int cc;
1277
1278 va_copy(ap2, ap);
1279 cc = ap_php_vsnprintf(NULL, 0, format, ap2);
1280 va_end(ap2);
1281
1282 *buf = NULL;
1283
1284 if (cc >= 0) {
1285 if ((*buf = malloc(++cc)) != NULL) {
1286 if ((cc = ap_php_vsnprintf(*buf, cc, format, ap)) < 0) {
1287 free(*buf);
1288 *buf = NULL;
1289 }
1290 }
1291 }
1292
1293 return cc;
1294 }
1295 /* }}} */
1296
ap_php_asprintf(char ** buf,const char * format,...)1297 PHPAPI int ap_php_asprintf(char **buf, const char *format, ...) /* {{{ */
1298 {
1299 int cc;
1300 va_list ap;
1301
1302 va_start(ap, format);
1303 cc = vasprintf(buf, format, ap);
1304 va_end(ap);
1305 return cc;
1306 }
1307 /* }}} */
1308
1309 /*
1310 * Local variables:
1311 * tab-width: 4
1312 * c-basic-offset: 4
1313 * End:
1314 * vim600: sw=4 ts=4 fdm=marker
1315 * vim<600: sw=4 ts=4
1316 */
1317
